Stave-retaining device for silos.



W. A. HOLNAGEL. TAVB RETAINiNG DEVICE FOR SILOS.

APPLIGATION FILED 1330.18, 1912.

Patented Aug. 11, 1914.

WITNESSES: QLAES'M QTBNMA.

ATTORNEY THE NORRIS PETERS CO., PHOTO-LITHOHIWASHINGTON D. C:

UNITED smrns Parana? onrron.

WILLIAM A. HOLNAGEL, 0F SAGINAW, MICHIGAN, ASSIG-NOR TO FARMERS HANDYWAGON CO., 0F SAG-INAW, MICHIGAN, A CORPORATION OF MICHIGAN.

STAVE-RETAINING DEVICE FOR SILOS.

Specification of Letters Patent.

Patented Aug. 11, 1914.

Application filed December 18, 1912. Serial No. 737,530.

To all whom it may concern Be it known that I, WILLIAM A. HOLNA- GEL, acitizen of the United States, residing at Saginaw, in the county ofSaginaw and State of Michigan, have invented certain new and usefulImprovements in Stave-Retaining Devices for Silos; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention is a reinforcing device for stave silos and theimprovement relates more particularly to the construction and mode ofoperation of a reinforcing device adapted to reduce the liability ofcollapse of stave silos when subjected to heavy wind pressure such as isdeveloped during a wind storm or hurricane.

As is well known, stave silos are usually built of a number of tonguedand grooved staves bound together by means of external hoops, and myimprovement adds to such a silo, independent of the hoops, a reinforcingdevice adapted to prevent the caving in of the sides of the silo underheavy wind pressure.

With these and certain other objects in view which will appear later inthe specification, my invention consists in the devices described andclaimed and the equivalents thereof.

In the drawings, Figure 1 represents a front view of a silo with myimproved reinforcing device attached; Fig. 2 is a perspective detail ofa number of staves to which the device is applied; Fig. 3 is a parthorizontal section showing a number of staves with the device in place,as viewed from above; and Fig. A is a perspective view of one of thefastenings of the stifi'ening device.

As is clearly shown in the drawings, the stiffening device consists of acircumferential band or girder fastened to the outside of the silo. Thesilo itself is formed of the usual staves l bound together by hoops 2.The stiffening band is preferably formed of a plurality of relativelyshort bars 3, preferably formed of cast metal and provided withlongitudinal slots 4 separated midway the length of the bars by across-brace 5 preferably cast integral with the bar. The centralbrace 5is formed with an opening to recelve a wood screw 6 or equivalent deviceby which the bar is fastened to the outer face of the silo stave. Thesebars 3 are arranged end to end to form a band extendingcircumferentially around the silo staves. Between the ends of adjacentbars a clearance space is left to allow for the expansion andcontraction of the staves.

Adjacent bars 3 are connected by an in tel-locking member 7 consistingpreferably of a T iron. The bottom flange of the interlocking member 7is received in the slots 4, the remaining flange of the T extendinghorizontally to form a stiffening rib. The screws 6 and the T iron 7prevent the staves from slipping upon each other lengthwise and thusallowing the silo to become distorted when subjected to heavy windpressure.

The bars 3 and the T irons 7 together form a stiffening band or girderthat prevents collapse of the silo wall inward when subjected to heavywind pressure.

Having described my invention, what I claim and desire to secure byLetters Patent, is

1.. In a stiffening device, the combination with the staves of a silo,of a socket-member secured to each of the silo-staves, said socketmembers arranged to extend in spaced relation circumferentially aroundsaid silostaves; and a T-shaped member slidably received in each pair ofadjacent socket-members spanning the space therebetween, permittingself-adjustment of the T-shaped members during either expansion orcontraction of the silostaves.

2. In a stiffening device, the combination with the staves of a silo, ofa socket member secured to each of the silo staves having a pair ofoppositely extending longitudinally disposed slots separated by means ofa cross-brace, means for fastening each socket member to a silo stave;and a T- shaped stiffening member having opposite ends slidably receivedin each pair of adjacent socket members.

In testimony whereof, I afliX my signa ture in presence of twowitnesses.

WILLIAM A. HOLNAGEL. TVitnesses:

FRED P. CORY, HARRY W. KINNEY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. O.

